Buccal tube



FIG. 1 is an isometric view of a buccal tube;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showings of various portions and other elements in the figures are for the purpose of illustrating unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a buccal tube, as shown and described. 